Para los que no han podido solucionar, a mi me funciono lo siguiente:
1. Flashea el equipo con un firmware 9.0
2. Con la Chimera elimine el bloqueo KnoxGuard (Adjunto Log)
Chimera Mobile Phone Utility version: 21.68.1040 @ 2019-07-14
Knox Guard Unlock started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-J400M
Sales Code: COB
Country Code: COLOMBIA
Timezone: America/Argentina/Buenos_Aires
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Thu Apr 25 03:54:48 KST 2019
PDA Version: J400MUBU3BSDD [april 2019, revD]
Phone Version: J400MUBU3BSD9 [april 2019, rev9]
CSC Version: J400MOWT3BSDD [april 2019, revD]
Product Code: COB
HIDSw Version: J400MUBU3BSDD/J400MOWT3BSDD/J400MUBU3BSD9/J400MUBU3BSDD
Board Platform...
1. Flashea el equipo con un firmware 9.0
2. Con la Chimera elimine el bloqueo KnoxGuard (Adjunto Log)
Chimera Mobile Phone Utility version: 21.68.1040 @ 2019-07-14
Knox Guard Unlock started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-J400M
Sales Code: COB
Country Code: COLOMBIA
Timezone: America/Argentina/Buenos_Aires
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Thu Apr 25 03:54:48 KST 2019
PDA Version: J400MUBU3BSDD [april 2019, revD]
Phone Version: J400MUBU3BSD9 [april 2019, rev9]
CSC Version: J400MOWT3BSDD [april 2019, revD]
Product Code: COB
HIDSw Version: J400MUBU3BSDD/J400MOWT3BSDD/J400MUBU3BSD9/J400MUBU3BSDD
Board Platform...
Por favor inicie sesión para ver el contenido completo. Conéctate o regístrate ahora.